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Diffstat (limited to 'libAACenc/src/aacenc_tns.h')
| -rw-r--r-- | libAACenc/src/aacenc_tns.h | 211 |
1 files changed, 111 insertions, 100 deletions
diff --git a/libAACenc/src/aacenc_tns.h b/libAACenc/src/aacenc_tns.h index 2824cbc..a37f978 100644 --- a/libAACenc/src/aacenc_tns.h +++ b/libAACenc/src/aacenc_tns.h @@ -1,74 +1,85 @@ - -/* ----------------------------------------------------------------------------------------------------------- +/* ----------------------------------------------------------------------------- Software License for The Fraunhofer FDK AAC Codec Library for Android -© Copyright 1995 - 2015 Fraunhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. - All rights reserved. +© Copyright 1995 - 2018 Fraunhofer-Gesellschaft zur Förderung der angewandten +Forschung e.V. All rights reserved. 1. INTRODUCTION -The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software that implements -the MPEG Advanced Audio Coding ("AAC") encoding and decoding scheme for digital audio. -This FDK AAC Codec software is intended to be used on a wide variety of Android devices. - -AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient general perceptual -audio codecs. AAC-ELD is considered the best-performing full-bandwidth communications codec by -independent studies and is widely deployed. AAC has been standardized by ISO and IEC as part -of the MPEG specifications. - -Patent licenses for necessary patent claims for the FDK AAC Codec (including those of Fraunhofer) -may be obtained through Via Licensing (www.vialicensing.com) or through the respective patent owners -individually for the purpose of encoding or decoding bit streams in products that are compliant with -the ISO/IEC MPEG audio standards. Please note that most manufacturers of Android devices already license -these patent claims through Via Licensing or directly from the patent owners, and therefore FDK AAC Codec -software may already be covered under those patent licenses when it is used for those licensed purposes only. - -Commercially-licensed AAC software libraries, including floating-point versions with enhanced sound quality, -are also available from Fraunhofer. Users are encouraged to check the Fraunhofer website for additional -applications information and documentation. +The Fraunhofer FDK AAC Codec Library for Android ("FDK AAC Codec") is software +that implements the MPEG Advanced Audio Coding ("AAC") encoding and decoding +scheme for digital audio. This FDK AAC Codec software is intended to be used on +a wide variety of Android devices. + +AAC's HE-AAC and HE-AAC v2 versions are regarded as today's most efficient +general perceptual audio codecs. AAC-ELD is considered the best-performing +full-bandwidth communications codec by independent studies and is widely +deployed. AAC has been standardized by ISO and IEC as part of the MPEG +specifications. + +Patent licenses for necessary patent claims for the FDK AAC Codec (including +those of Fraunhofer) may be obtained through Via Licensing +(www.vialicensing.com) or through the respective patent owners individually for +the purpose of encoding or decoding bit streams in products that are compliant +with the ISO/IEC MPEG audio standards. Please note that most manufacturers of +Android devices already license these patent claims through Via Licensing or +directly from the patent owners, and therefore FDK AAC Codec software may +already be covered under those patent licenses when it is used for those +licensed purposes only. + +Commercially-licensed AAC software libraries, including floating-point versions +with enhanced sound quality, are also available from Fraunhofer. Users are +encouraged to check the Fraunhofer website for additional applications +information and documentation. 2. COPYRIGHT LICENSE -Redistribution and use in source and binary forms, with or without modification, are permitted without -payment of copyright license fees provided that you satisfy the following conditions: +Redistribution and use in source and binary forms, with or without modification, +are permitted without payment of copyright license fees provided that you +satisfy the following conditions: -You must retain the complete text of this software license in redistributions of the FDK AAC Codec or -your modifications thereto in source code form. +You must retain the complete text of this software license in redistributions of +the FDK AAC Codec or your modifications thereto in source code form. -You must retain the complete text of this software license in the documentation and/or other materials -provided with redistributions of the FDK AAC Codec or your modifications thereto in binary form. -You must make available free of charge copies of the complete source code of the FDK AAC Codec and your +You must retain the complete text of this software license in the documentation +and/or other materials provided with redistributions of the FDK AAC Codec or +your modifications thereto in binary form. You must make available free of +charge copies of the complete source code of the FDK AAC Codec and your modifications thereto to recipients of copies in binary form. -The name of Fraunhofer may not be used to endorse or promote products derived from this library without -prior written permission. +The name of Fraunhofer may not be used to endorse or promote products derived +from this library without prior written permission. -You may not charge copyright license fees for anyone to use, copy or distribute the FDK AAC Codec -software or your modifications thereto. +You may not charge copyright license fees for anyone to use, copy or distribute +the FDK AAC Codec software or your modifications thereto. -Your modified versions of the FDK AAC Codec must carry prominent notices stating that you changed the software -and the date of any change. For modified versions of the FDK AAC Codec, the term -"Fraunhofer FDK AAC Codec Library for Android" must be replaced by the term -"Third-Party Modified Version of the Fraunhofer FDK AAC Codec Library for Android." +Your modified versions of the FDK AAC Codec must carry prominent notices stating +that you changed the software and the date of any change. For modified versions +of the FDK AAC Codec, the term "Fraunhofer FDK AAC Codec Library for Android" +must be replaced by the term "Third-Party Modified Version of the Fraunhofer FDK +AAC Codec Library for Android." 3. NO PATENT LICENSE -NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without limitation the patents of Fraunhofer, -ARE GRANTED BY THIS SOFTWARE LICENSE. Fraunhofer provides no warranty of patent non-infringement with -respect to this software. +NO EXPRESS OR IMPLIED LICENSES TO ANY PATENT CLAIMS, including without +limitation the patents of Fraunhofer, ARE GRANTED BY THIS SOFTWARE LICENSE. +Fraunhofer provides no warranty of patent non-infringement with respect to this +software. -You may use this FDK AAC Codec software or modifications thereto only for purposes that are authorized -by appropriate patent licenses. +You may use this FDK AAC Codec software or modifications thereto only for +purposes that are authorized by appropriate patent licenses. 4. DISCLAIMER -This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright holders and contributors -"AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, including but not limited to the implied warranties -of merchantability and fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR -CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, or consequential damages, -including but not limited to procurement of substitute goods or services; loss of use, data, or profits, -or business interruption, however caused and on any theory of liability, whether in contract, strict -liability, or tort (including negligence), arising in any way out of the use of this software, even if -advised of the possibility of such damage. +This FDK AAC Codec software is provided by Fraunhofer on behalf of the copyright +holders and contributors "AS IS" and WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, +including but not limited to the implied warranties of merchantability and +fitness for a particular purpose. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR +CONTRIBUTORS BE LIABLE for any direct, indirect, incidental, special, exemplary, +or consequential damages, including but not limited to procurement of substitute +goods or services; loss of use, data, or profits, or business interruption, +however caused and on any theory of liability, whether in contract, strict +liability, or tort (including negligence), arising in any way out of the use of +this software, even if advised of the possibility of such damage. 5. CONTACT INFORMATION @@ -79,25 +90,25 @@ Am Wolfsmantel 33 www.iis.fraunhofer.de/amm amm-info@iis.fraunhofer.de ------------------------------------------------------------------------------------------------------------ */ +----------------------------------------------------------------------------- */ + +/**************************** AAC encoder library ****************************** -/******************************** MPEG Audio Encoder ************************** + Author(s): Alex Groeschel - Initial author: Alex Groeschel - contents/description: Temporal noise shaping + Description: Temporal noise shaping -******************************************************************************/ +*******************************************************************************/ -#ifndef _TNS_H -#define _TNS_H +#ifndef AACENC_TNS_H +#define AACENC_TNS_H #include "common_fix.h" #include "psy_const.h" - #ifndef PI -#define PI 3.1415926535897931f +#define PI 3.1415926535897931f #endif /** @@ -114,32 +125,33 @@ amm-info@iis.fraunhofer.de /* TNS max filter order for Low Complexity MPEG4 profile */ #define TNS_MAX_ORDER 12 - #define MAX_NUM_OF_FILTERS 2 -#define HIFILT 0 /* index of higher filter */ -#define LOFILT 1 /* index of lower filter */ - - -typedef struct{ /* stuff that is tabulated dependent on bitrate etc. */ - INT filterEnabled[MAX_NUM_OF_FILTERS]; - INT threshOn[MAX_NUM_OF_FILTERS]; /* min. prediction gain for using tns TABUL*/ - INT filterStartFreq[MAX_NUM_OF_FILTERS]; /* lowest freq for lpc TABUL*/ - INT tnsLimitOrder[MAX_NUM_OF_FILTERS]; /* Limit for TNS order TABUL*/ - INT tnsFilterDirection[MAX_NUM_OF_FILTERS]; /* Filtering direction, 0=up, 1=down TABUL */ - INT acfSplit[MAX_NUM_OF_FILTERS]; - FIXP_DBL tnsTimeResolution[MAX_NUM_OF_FILTERS]; /* TNS max. time resolution TABUL. Should be fract but MSVC won't compile then */ - INT seperateFiltersAllowed; +#define HIFILT 0 /* index of higher filter */ +#define LOFILT 1 /* index of lower filter */ + +typedef struct { /* stuff that is tabulated dependent on bitrate etc. */ + INT filterEnabled[MAX_NUM_OF_FILTERS]; + INT threshOn[MAX_NUM_OF_FILTERS]; /* min. prediction gain for using tns + TABUL*/ + INT filterStartFreq[MAX_NUM_OF_FILTERS]; /* lowest freq for lpc TABUL*/ + INT tnsLimitOrder[MAX_NUM_OF_FILTERS]; /* Limit for TNS order TABUL*/ + INT tnsFilterDirection[MAX_NUM_OF_FILTERS]; /* Filtering direction, 0=up, + 1=down TABUL */ + INT acfSplit[MAX_NUM_OF_FILTERS]; + FIXP_DBL tnsTimeResolution[MAX_NUM_OF_FILTERS]; /* TNS max. time resolution + TABUL. Should be fract but + MSVC won't compile then */ + INT seperateFiltersAllowed; } TNS_PARAMETER_TABULATED; - -typedef struct { /*assigned at InitTime*/ +typedef struct { /*assigned at InitTime*/ TNS_PARAMETER_TABULATED confTab; INT isLowDelay; INT tnsActive; - INT maxOrder; /* max. order of tns filter */ + INT maxOrder; /* max. order of tns filter */ INT coefRes; - FIXP_DBL acfWindow[MAX_NUM_OF_FILTERS][TNS_MAX_ORDER+3+1]; + FIXP_DBL acfWindow[MAX_NUM_OF_FILTERS][TNS_MAX_ORDER + 3 + 1]; /* now some things that only probably can be done at Init time; could be they have to be split up for each individual (short) window or even filter. */ @@ -148,55 +160,54 @@ typedef struct { /*assigned at InitTime*/ INT lpcStopBand; INT lpcStopLine; -}TNS_CONFIG; - +} TNS_CONFIG; typedef struct { - INT tnsActive[MAX_NUM_OF_FILTERS]; - INT predictionGain[MAX_NUM_OF_FILTERS]; + INT tnsActive[MAX_NUM_OF_FILTERS]; + INT predictionGain[MAX_NUM_OF_FILTERS]; } TNS_SUBBLOCK_INFO; -typedef struct{ /*changed at runTime*/ +typedef struct { /*changed at runTime*/ TNS_SUBBLOCK_INFO subBlockInfo[TRANS_FAC]; FIXP_DBL ratioMultTable[TRANS_FAC][MAX_SFB_SHORT]; } TNS_DATA_SHORT; -typedef struct{ /*changed at runTime*/ +typedef struct { /*changed at runTime*/ TNS_SUBBLOCK_INFO subBlockInfo; FIXP_DBL ratioMultTable[MAX_SFB_LONG]; } TNS_DATA_LONG; /* can be implemented as union */ -typedef shouldBeUnion{ +typedef shouldBeUnion { TNS_DATA_LONG Long; TNS_DATA_SHORT Short; -}TNS_DATA_RAW; +} +TNS_DATA_RAW; -typedef struct{ +typedef struct { INT numOfSubblocks; TNS_DATA_RAW dataRaw; INT tnsMaxScaleSpec; INT filtersMerged; -}TNS_DATA; +} TNS_DATA; -typedef struct{ +typedef struct { INT numOfFilters[TRANS_FAC]; INT coefRes[TRANS_FAC]; INT length[TRANS_FAC][MAX_NUM_OF_FILTERS]; INT order[TRANS_FAC][MAX_NUM_OF_FILTERS]; INT direction[TRANS_FAC][MAX_NUM_OF_FILTERS]; INT coefCompress[TRANS_FAC][MAX_NUM_OF_FILTERS]; - /* for Long: length TNS_MAX_ORDER (12 for LC) is required -> 12 */ - /* for Short: length TRANS_FAC*TNS_MAX_ORDER (only 5 for short LC) is required -> 8*5=40 */ - /* Currently TRANS_FAC*TNS_MAX_ORDER = 8*12 = 96 (for LC) is used (per channel)! Memory could be saved here! */ + /* for Long: length TNS_MAX_ORDER (12 for LC) is required -> 12 */ + /* for Short: length TRANS_FAC*TNS_MAX_ORDER (only 5 for short LC) is required + * -> 8*5=40 */ + /* Currently TRANS_FAC*TNS_MAX_ORDER = 8*12 = 96 (for LC) is used (per + * channel)! Memory could be saved here! */ INT coef[TRANS_FAC][MAX_NUM_OF_FILTERS][TNS_MAX_ORDER]; -}TNS_INFO; +} TNS_INFO; -INT FDKaacEnc_FreqToBandWithRounding( - const INT freq, - const INT fs, - const INT numOfBands, - const INT *bandStartOffset - ); +INT FDKaacEnc_FreqToBandWidthRounding(const INT freq, const INT fs, + const INT numOfBands, + const INT *bandStartOffset); -#endif /* _TNS_H */ +#endif /* AACENC_TNS_H */ |